The scatterplot below charts the performance of an electric motor. 3000 2900 2800 2700 2600 2 2500 Speed of Rotation (in RPMs) 2400 2300 2200 2100 2000 0 1350 1400 1450 Voltage (in mV) 1500 1550 1600 1650 1700 1750 Which answer choice correctly indicates the explanatory variable and the response variable of the scatterplot? Explanatory variable: Rotation Response variable: Electric motor Explanatory variable: Voltage Response variable: Rotation Explanatory variable: Voltage Response variable: Electric motor Voltage (in mV) Which answer choice correctly indicates the explanatory variable and the response variable of the scatterplot? O Explanatory variable: Rotation Response variable: Electric motor Explanatory variable: Voltage Response variable: Rotation Explanatory variable: Voltage Response variable: Electric motor Explanatory variable: Rotation Response variable: Voltage